HotCRP is conference review software. HotCRP versions from October 2025 through January 2026 delivered documents of all types with inline Content-Disposition, causing them to be rendered in the user’s browser rather than downloaded. (The intended behavior was for only text/plain, application/pdf, image/gif, image/jpeg, and image/png to be delivered inline, though adding save=0 to the document URL could request inline delivery for any document.) This made users who clicked a document link vulnerable to cross-site scripting attacks. An uploaded HTML or SVG document would run in the viewer’s browser with access to their HotCRP credentials, and Javascript in that document could eventually make arbitrary calls to HotCRP’s API. Malicious documents could be uploaded to submission fields with “file upload” or “attachment” type, or as attachments to comments. PDF upload fields were not vulnerable. A search of documents uploaded to hotcrp.com found no evidence of exploitation. The vulnerability was introduced in commit aa20ef288828b04550950cf67c831af8a525f508 (11 October 2025), present in development versions and v3.2, and fixed in commit 8933e86c9f384b356dc4c6e9e2814dee1074b323 and v3.2.1. Additionally, c3d88a7e18d52119c65df31c2cc994edd2beccc5 and v3.2.1 remove support for save=0.
CVE-2026-25156
“—” beside the score: it is equal to NVD's CVSS score.
This medium-severity CVE scores 6.3 under NVD CVSS v3. EPSS exploit probability: 0.3% (20th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-5000 (ENISA EUVD)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).
- CVSS v3
- 6.3
- EG Score
- 6.3MEDIUMmedium confidence
- EG Risk
- 28EG Risk 28/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity63% × 45%Impact severity (EG Severity): CVSS 6.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.3% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule. - EPSS PROB
- 0.3%
- EPSS %ILE
- 20th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (6.3): severity, escalated by confirmed exploitation. This CVE's 6.3 is its impact severity (EG Severity), not escalated.
- EG Severity
- 6.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 0.3% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.
A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
January 30, 2026
Last Modified
June 17, 2026
Advisory Details (4)
Auto-updated Aug 7, 2026Stored XSS via comment attachments · Advisory · kohler/hotcrp · GitHub
https://github.com/kohler/hotcrp/security/advisories/GHSA-p88p-2f2p-2476commit c3d88a7e18d5 (kohler/hotcrp)
Fix landed in kohler/hotcrp commit c3d88a7e18d5 — awaiting tagged release
https://github.com/kohler/hotcrp/commit/c3d88a7e18d52119c65df31c2cc994edd2beccc5commit aa20ef288828 (kohler/hotcrp)
Fix landed in kohler/hotcrp commit aa20ef288828 — awaiting tagged release
https://github.com/kohler/hotcrp/commit/aa20ef288828b04550950cf67c831af8a525f508commit 8933e86c9f38 (kohler/hotcrp)
Fix landed in kohler/hotcrp commit 8933e86c9f38 — awaiting tagged release
https://github.com/kohler/hotcrp/commit/8933e86c9f384b356dc4c6e9e2814dee1074b323Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 39× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 99 of 203 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 104 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.3% · 20th percentile
- 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
- 2026-10-31 01:55 UTCOSV refresh
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
- 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
- 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 19th percentile
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 19th percentile
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
- 2026-10-25 14:40 UTCEG score recompute
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-10-23 04:40 UTCEG score recompute
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-10-18 03:53 UTCEG score recompute
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-12 16:19 UTCEG score recompute
- 2026-10-11 20:01 UTCEG score recompute
- 2026-10-11 17:14 UTCEG score recompute
- 2026-10-11 14:46 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-08 18:05 UTCOSV refresh
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 15th percentile
- 2026-09-19 00:00 UTCOSV refresh
- 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 15th percentile
- 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-31 04:02 UTCOSV refresh
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
- 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-14 11:48 UTCEG score recompute
- 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-13 03:56 UTCEG score recompute
- 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-09 16:18 UTCEG score recompute
- 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-07 23:07 UTCEG score recompute
- 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-06 04:38 UTCEG score recompute
- 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-02 21:46 UTCEG score recompute▼ 1.00
- 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 13th percentile
- 2026-07-31 02:04 UTCOSV refresh
- 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Related CVEs(same CWE)
Same CWE
10 shownCWE-79
Frequently asked(5)
What is CVE-2026-25156?
When was the CVE record for CVE-2026-25156 published?
Is CVE-2026-25156 actively exploited?
What is the CVSS score of CVE-2026-25156?
How do I remediate CVE-2026-25156?
Dependency Blast Radius
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