CVE-2015-8833

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 7.0%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Use-after-free vulnerability in the create_smp_dialog function in gtk-dialog.c in the Off-the-Record Messaging (OTR) pidgin-otr plugin before 4.0.2 for Pidgin allows remote attackers to execute arbitrary code via vectors related to the "Authenticate buddy" menu item.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
51
EG Risk 51/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation7% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
7.0%
EPSS %ILE
94th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 12, 2016

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Sep 30, 2026
Patch available.
generic

Heap use after free in Pidgin-OTR plugin (CVE-2015-8833) | The Fuzzing Project

https://blog.fuzzing-project.org/39-Heap-use-after-free-in-Pidgin-OTR-plugin-CVE-2015-8833.html
generic

CVE-2015-8833 - PSIRT.COM

http://www.securityfocus.com/bid/84295
generic

oss-security - Heap use after free in Pidgin-OTR plugin

http://www.openwall.com/lists/oss-security/2016/03/09/8
generic

oss-security - Re: Heap use after free in Pidgin-OTR plugin

http://www.openwall.com/lists/oss-security/2016/03/09/13
genericMentions a patch (unverified)

[SECURITY] [DSA 3528-1] pidgin-otr security update

http://www.debian.org/security/2016/dsa-3528

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
pidgin-otr—
  • every version up to 4.0.2-1: fixed in 4.0.2-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
pidgin-otr—
  • every version up to 4.0.2-1: fixed in 4.0.2-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
pidgin-otr—
  • every version up to 4.0.2-1: fixed in 4.0.2-1
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
pidgin-otr4.0.1-1
  • every version up to 4.0.1-1+deb8u1: fixed in 4.0.1-1+deb8u1
—

Data Freshness Timeline

(refreshed 6× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 160 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
  2. 2026-10-03 17:51 UTCOSV refresh
  3. 2026-10-03 14:21 UTCEPSS rescore
  4. 2026-09-30 14:58 UTCEPSS rescore
  5. 2026-09-30 14:58 UTCEPSS rescore
  6. 2026-09-30 09:08 UTCEG score recompute
  7. 2026-09-28 13:45 UTCEPSS rescore
  8. 2026-09-27 13:40 UTCEPSS rescore
  9. 2026-09-26 15:53 UTCEPSS rescore
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  11. 2026-09-23 13:41 UTCEPSS rescore
  12. 2026-09-20 20:09 UTCEPSS rescore
  13. 2026-09-19 15:35 UTCEPSS rescore
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  15. 2026-09-17 19:21 UTCEPSS rescore
  16. 2026-09-15 03:05 UTCEPSS rescore
  17. 2026-09-14 08:20 UTCOSV refresh
  18. 2026-09-13 16:41 UTCEPSS rescore
  19. 2026-09-12 14:55 UTCEPSS rescore
  20. 2026-09-11 09:31 UTCEPSS rescore
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  22. 2026-09-07 15:56 UTCEPSS rescore
  23. 2026-09-06 13:42 UTCEPSS rescore
  24. 2026-09-04 13:55 UTCEPSS rescore
  25. 2026-09-02 14:07 UTCEPSS rescore
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  1. 2026-09-01 13:48 UTCEPSS rescore
  2. 2026-09-01 03:31 UTCEPSS rescore
  3. 2026-08-27 14:20 UTCEPSS rescore
  4. 2026-08-26 14:41 UTCEPSS rescore
  5. 2026-08-26 09:43 UTCOSV refresh
  6. 2026-08-25 13:44 UTCEPSS rescore
  7. 2026-08-23 00:13 UTCEPSS rescore
  8. 2026-08-21 23:44 UTCEPSS rescore
  9. 2026-08-20 22:50 UTCEPSS rescore
  10. 2026-08-19 16:59 UTCEPSS rescore
  11. 2026-08-18 13:43 UTCEPSS rescore
  12. 2026-08-16 14:51 UTCEPSS rescore
  13. 2026-08-16 02:09 UTCEPSS rescore
  14. 2026-08-15 01:25 UTCEPSS rescore
  15. 2026-08-12 13:46 UTCEPSS rescore
  16. 2026-08-11 13:36 UTCEPSS rescore
  17. 2026-08-09 23:40 UTCOSV refresh
  18. 2026-08-09 13:42 UTCEPSS rescore
  19. 2026-08-08 16:32 UTCEPSS rescore
  20. 2026-08-07 16:22 UTCEPSS rescore
  21. 2026-08-06 13:42 UTCEPSS rescore
  22. 2026-08-05 19:12 UTCEPSS rescore
  23. 2026-08-04 15:04 UTCEPSS rescore
  24. 2026-08-04 10:31 UTCEPSS rescore
  25. 2026-08-01 04:11 UTCEPSS rescore
  26. 2026-07-30 01:26 UTCEPSS rescore
  27. 2026-07-30 01:26 UTCEPSS rescore
  28. 2026-07-28 15:31 UTCEPSS rescore
  29. 2026-07-26 14:50 UTCEPSS rescore
  30. 2026-07-25 14:13 UTCEPSS rescore
  31. 2026-07-25 00:11 UTCOSV refresh
  32. 2026-07-24 14:13 UTCEPSS rescore
  33. 2026-07-23 14:14 UTCEPSS rescore
  34. 2026-07-23 01:20 UTCEG score recompute
  35. 2026-07-23 00:21 UTCEG score recompute
  36. 2026-07-22 22:00 UTCEG score recompute
  37. 2026-07-22 14:04 UTCEPSS rescore
  38. 2026-07-21 15:21 UTCEPSS rescore
  39. 2026-07-21 15:21 UTCEPSS rescore
  40. 2026-07-20 17:03 UTCEPSS rescore
  41. 2026-07-19 14:27 UTCEPSS rescore
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  43. 2026-07-19 02:26 UTCEPSS rescore
  44. 2026-07-19 02:26 UTCEPSS rescore
  45. 2026-07-18 10:00 UTCEPSS rescore
  46. 2026-07-16 16:59 UTCEPSS rescore
  47. 2026-07-15 16:54 UTCEPSS rescore
  48. 2026-07-15 16:54 UTCEPSS rescore
  49. 2026-07-15 01:56 UTCEPSS rescore
  50. 2026-07-13 22:26 UTCEPSS rescore
  51. 2026-07-13 22:26 UTCEPSS rescore
  52. 2026-07-12 05:42 UTCEPSS rescore
  53. 2026-07-11 08:23 UTCEPSS rescore
  54. 2026-07-09 19:05 UTCEPSS rescore
  55. 2026-07-09 19:05 UTCEPSS rescore
  56. 2026-07-08 15:10 UTCEPSS rescore
  57. 2026-07-07 19:12 UTCOSV refresh
  58. 2026-07-07 13:42 UTCEPSS rescore
  59. 2026-07-07 13:42 UTCEPSS rescore
  60. 2026-07-06 16:24 UTCEPSS rescore
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  63. 2026-07-04 06:28 UTCEPSS rescore
  64. 2026-07-01 15:02 UTCEPSS rescore
  65. 2026-06-30 23:19 UTCEPSS rescore
  66. 2026-06-30 23:19 UTCEPSS rescore
  67. 2026-06-29 14:03 UTCEPSS rescore
  68. 2026-06-29 14:03 UTCEPSS rescore
  69. 2026-06-28 04:53 UTCEPSS rescore
  70. 2026-06-27 03:05 UTCEPSS rescore
  71. 2026-06-25 13:47 UTCEPSS rescore
  72. 2026-06-25 13:47 UTCEPSS rescore
  73. 2026-06-24 14:02 UTCEPSS rescore
  74. 2026-06-24 14:02 UTCEPSS rescore
  75. 2026-06-23 21:30 UTCEPSS rescore

Related CVEs(same product)

Same product

1 shown

Debian:11:pidgin-otr

Frequently asked(5)

What is CVE-2015-8833?
CVE-2015-8833 is a critical vulnerability published on April 12, 2016. Use-after-free vulnerability in the createsmpdialog function in gtk-dialog.c in the Off-the-Record Messaging (OTR) pidgin-otr plugin before 4.0.2 for Pidgin allows remote attackers to execute arbitrary code via vectors related to the "Authenticate buddy" menu item.
When was CVE-2015-8833 disclosed?
CVE-2015-8833 was first published on April 12, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-8833 actively exploited?
CVE-2015-8833 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.0% probability of exploitation in the next 30 days (94th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2015-8833?
CVE-2015-8833 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2015-8833?
A fix for CVE-2015-8833 is available: update to the fixed version the vendor names in its advisory.

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